Fair Value Measurements: Pretax Effect from Changes in Fair Value of Liabilities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Change in value of common stock warrants [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Pre-tax effect resulting from changes in fair value	$ 2,401	$ (1,390)	$ 4,118	$ (6,690)
Change in value of contingent consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Pre-tax effect resulting from changes in fair value	996	0	5,758	0
Interest expense and financing costs, net [Member] | Debt prepayment derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Pre-tax effect resulting from changes in fair value	0	285	0	45
Cost of revenues [Member] | Commodities - exchange traded futures [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Pre-tax effect resulting from changes in fair value of derivatives	191	0	0	104
Cost of revenues [Member] | Commodities - physical forward contracts [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Pre-tax effect resulting from changes in fair value of derivatives	$ 448	$ 0	$ (693)	$ 306